If you do this the inside cover of your paper will be smooth, if you don't there is a chance there will be a line resulting from the edge of the manilla.

如果你做了这一步，封面内侧会比较平整。

youdao

Put all 3 ingredients into the blender. Cover with the lid. Process until smooth. Pour into the glass.

将3份原料放入搅拌器，盖上盖子，直至搅拌均匀，倒入玻璃杯。

youdao

Puppy Linux: Very slim (97 MB) distribution, but retains a basically smooth and polished interface, with apps to cover common computer USES.

lPuppy Linux：非常苗条(97mb)的分发包，但是它保留了基本的平滑、光洁的界面，并且包含了基本电脑应用程序。

youdao

For the quality of its engineering, its smooth, cylindrical structure graced the cover of Scientific American, an American scholarly magazine.

ECONOMIST: The Fastnet Lighthouse: Light on a lonely rock | The

I'm not sure if it's just my phone, but when closed, the cover sticks up about 1 or 2mm and isn't smooth when running your fingers up and down.

ENGADGET: Hands-on with Motorola's RAZR V3 for Cingular